1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include <errno.h>
27 #include <string.h>
28 #include <sys/types.h>
29 #include <sys/socket.h>
30 #if defined(__linux__)
31 #include <sys/poll.h>
32 #endif
33 #include <netinet/tcp.h> /* Defines TCP_NODELAY, needed for 2.6 */
34 #include <netinet/in.h>
35 #ifdef __linux__
36 #include <netinet/ip.h>
37 #endif
38 #include <netdb.h>
39 #include <stdlib.h>
40
41 #ifdef __solaris__
42 #include <fcntl.h>
43 #endif
44 #ifdef __linux__
45 #include <unistd.h>
46 #include <sys/sysctl.h>
47 #endif
48
49 #include "jvm.h"
50 #include "jni_util.h"
51 #include "net_util.h"
52
53 #include "java_net_SocketOptions.h"
54 #include "java_net_PlainSocketImpl.h"
55
56 /************************************************************************
57 * PlainSocketImpl
58 */
59
60 static jfieldID IO_fd_fdID;
61
62 jfieldID psi_fdID;
63 jfieldID psi_addressID;
64 jfieldID psi_ipaddressID;
65 jfieldID psi_portID;
66 jfieldID psi_localportID;
67 jfieldID psi_timeoutID;
68 jfieldID psi_trafficClassID;
69 jfieldID psi_serverSocketID;
70 jfieldID psi_fdLockID;
71 jfieldID psi_closePendingID;
72
73 extern void setDefaultScopeID(JNIEnv *env, struct sockaddr *him);
74
75 /*
76 * file descriptor used for dup2
77 */
78 static int marker_fd = -1;
79
80
81 #define SET_NONBLOCKING(fd) { \
82 int flags = fcntl(fd, F_GETFL); \
83 flags |= O_NONBLOCK; \
84 fcntl(fd, F_SETFL, flags); \
85 }
86
87 #define SET_BLOCKING(fd) { \
88 int flags = fcntl(fd, F_GETFL); \
89 flags &= ~O_NONBLOCK; \
90 fcntl(fd, F_SETFL, flags); \
91 }
92
93 /*
94 * Create the marker file descriptor by establishing a loopback connection
95 * which we shutdown but do not close the fd. The result is an fd that
96 * can be used for read/write.
97 */
98 static int getMarkerFD()
99 {
100 int sv[2];
101
102 #ifdef AF_UNIX
103 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1) {
104 return -1;
105 }
106 #else
107 return -1;
108 #endif
109
110 /*
111 * Finally shutdown sv[0] (any reads to this fd will get
112 * EOF; any writes will get an error).
113 */
114 shutdown(sv[0], 2);
115 close(sv[1]);
116
117 return sv[0];
118 }
119
120 /*
121 * Return the file descriptor given a PlainSocketImpl
122 */
123 static int getFD(JNIEnv *env, jobject this) {
124 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
125 CHECK_NULL_RETURN(fdObj, -1);
126 return (*env)->GetIntField(env, fdObj, IO_fd_fdID);
127 }
128
129 /*
130 * The initroto function is called whenever PlainSocketImpl is
131 * loaded, to cache field IDs for efficiency. This is called every time
132 * the Java class is loaded.
133 *
134 * Class: java_net_PlainSocketImpl
135 * Method: initProto
136 * Signature: ()V
137 */
138 JNIEXPORT void JNICALL
139 Java_java_net_PlainSocketImpl_initProto(JNIEnv *env, jclass cls) {
140 psi_fdID = (*env)->GetFieldID(env, cls , "fd",
141 "Ljava/io/FileDescriptor;");
142 CHECK_NULL(psi_fdID);
143 psi_addressID = (*env)->GetFieldID(env, cls, "address",
144 "Ljava/net/InetAddress;");
145 CHECK_NULL(psi_addressID);
146 psi_portID = (*env)->GetFieldID(env, cls, "port", "I");
147 CHECK_NULL(psi_portID);
148 psi_localportID = (*env)->GetFieldID(env, cls, "localport", "I");
149 CHECK_NULL(psi_localportID);
150 psi_timeoutID = (*env)->GetFieldID(env, cls, "timeout", "I");
151 CHECK_NULL(psi_timeoutID);
152 psi_trafficClassID = (*env)->GetFieldID(env, cls, "trafficClass", "I");
153 CHECK_NULL(psi_trafficClassID);
154 psi_serverSocketID = (*env)->GetFieldID(env, cls, "serverSocket",
155 "Ljava/net/ServerSocket;");
156 CHECK_NULL(psi_serverSocketID);
157 psi_fdLockID = (*env)->GetFieldID(env, cls, "fdLock",
158 "Ljava/lang/Object;");
159 CHECK_NULL(psi_fdLockID);
160 psi_closePendingID = (*env)->GetFieldID(env, cls, "closePending", "Z");
161 CHECK_NULL(psi_closePendingID);
162 IO_fd_fdID = NET_GetFileDescriptorID(env);
163 CHECK_NULL(IO_fd_fdID);
164
165 initInetAddressIDs(env);
166 JNU_CHECK_EXCEPTION(env);
167
168 /* Create the marker fd used for dup2 */
169 marker_fd = getMarkerFD();
170 }
171
172 /* a global reference to the java.net.SocketException class. In
173 * socketCreate, we ensure that this is initialized. This is to
174 * prevent the problem where socketCreate runs out of file
175 * descriptors, and is then unable to load the exception class.
176 */
177 static jclass socketExceptionCls;
178
179 /*
180 * Class: java_net_PlainSocketImpl
181 * Method: socketCreate
182 * Signature: (Z)V */
183 JNIEXPORT void JNICALL
184 Java_java_net_PlainSocketImpl_socketCreate(JNIEnv *env, jobject this,
185 jboolean stream) {
186 jobject fdObj, ssObj;
187 int fd;
188 int type = (stream ? SOCK_STREAM : SOCK_DGRAM);
189 #ifdef AF_INET6
190 int domain = ipv6_available() ? AF_INET6 : AF_INET;
191 #else
192 int domain = AF_INET;
193 #endif
194
195 if (socketExceptionCls == NULL) {
196 jclass c = (*env)->FindClass(env, "java/net/SocketException");
197 CHECK_NULL(c);
198 socketExceptionCls = (jclass)(*env)->NewGlobalRef(env, c);
199 CHECK_NULL(socketExceptionCls);
200 }
201 fdObj = (*env)->GetObjectField(env, this, psi_fdID);
202
203 if (fdObj == NULL) {
204 (*env)->ThrowNew(env, socketExceptionCls, "null fd object");
205 return;
206 }
207
208 if ((fd = socket(domain, type, 0)) == -1) {
209 /* note: if you run out of fds, you may not be able to load
210 * the exception class, and get a NoClassDefFoundError
211 * instead.
212 */
213 NET_ThrowNew(env, errno, "can't create socket");
214 return;
215 }
216
217 #ifdef AF_INET6
218 /* Disable IPV6_V6ONLY to ensure dual-socket support */
219 if (domain == AF_INET6) {
220 int arg = 0;
221 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&arg,
222 sizeof(int)) < 0) {
223 NET_ThrowNew(env, errno, "cannot set IPPROTO_IPV6");
224 close(fd);
225 return;
226 }
227 }
228 #endif /* AF_INET6 */
229
230 /*
231 * If this is a server socket then enable SO_REUSEADDR
232 * automatically and set to non blocking.
233 */
234 ssObj = (*env)->GetObjectField(env, this, psi_serverSocketID);
235 if (ssObj != NULL) {
236 int arg = 1;
237 SET_NONBLOCKING(fd);
238 if (NET_SetSockOpt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&arg,
239 sizeof(arg)) < 0) {
240 NET_ThrowNew(env, errno, "cannot set SO_REUSEADDR");
241 close(fd);
242 return;
243 }
244 }
245
246 (*env)->SetIntField(env, fdObj, IO_fd_fdID, fd);
247 }
248
249 /*
250 * inetAddress is the address object passed to the socket connect
251 * call.
252 *
253 * Class: java_net_PlainSocketImpl
254 * Method: socketConnect
255 * Signature: (Ljava/net/InetAddress;I)V
256 */
257 JNIEXPORT void JNICALL
258 Java_java_net_PlainSocketImpl_socketConnect(JNIEnv *env, jobject this,
259 jobject iaObj, jint port,
260 jint timeout)
261 {
262 jint localport = (*env)->GetIntField(env, this, psi_localportID);
263 int len = 0;
264
265 /* fdObj is the FileDescriptor field on this */
266 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
267
268 jclass clazz = (*env)->GetObjectClass(env, this);
269
270 jobject fdLock;
271
272 jint trafficClass = (*env)->GetIntField(env, this, psi_trafficClassID);
273
274 /* fd is an int field on iaObj */
275 jint fd;
276
277 SOCKADDR him;
278 /* The result of the connection */
279 int connect_rv = -1;
280
281 if (IS_NULL(fdObj)) {
282 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
283 return;
284 } else {
285 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
286 }
287 if (IS_NULL(iaObj)) {
288 JNU_ThrowNullPointerException(env, "inet address argument null.");
289 return;
290 }
291
292 /* connect */
293 if (NET_InetAddressToSockaddr(env, iaObj, port, (struct sockaddr *)&him, &len, JNI_TRUE) != 0) {
294 return;
295 }
296 setDefaultScopeID(env, (struct sockaddr *)&him);
297
298 #ifdef AF_INET6
299 if (trafficClass != 0 && ipv6_available()) {
300 NET_SetTrafficClass((struct sockaddr *)&him, trafficClass);
301 }
302 #endif /* AF_INET6 */
303 if (timeout <= 0) {
304 connect_rv = NET_Connect(fd, (struct sockaddr *)&him, len);
305 #ifdef __solaris__
306 if (connect_rv == -1 && errno == EINPROGRESS ) {
307
308 /* This can happen if a blocking connect is interrupted by a signal.
309 * See 6343810.
310 */
311 while (1) {
312 struct pollfd pfd;
313 pfd.fd = fd;
314 pfd.events = POLLOUT;
315
316 connect_rv = NET_Poll(&pfd, 1, -1);
317
318 if (connect_rv == -1) {
319 if (errno == EINTR) {
320 continue;
321 } else {
322 break;
323 }
324 }
325 if (connect_rv > 0) {
326 socklen_t optlen;
327 /* has connection been established */
328 optlen = sizeof(connect_rv);
329 if (getsockopt(fd, SOL_SOCKET, SO_ERROR,
330 (void*)&connect_rv, &optlen) <0) {
331 connect_rv = errno;
332 }
333
334 if (connect_rv != 0) {
335 /* restore errno */
336 errno = connect_rv;
337 connect_rv = -1;
338 }
339 break;
340 }
341 }
342 }
343 #endif
344 } else {
345 /*
346 * A timeout was specified. We put the socket into non-blocking
347 * mode, connect, and then wait for the connection to be
348 * established, fail, or timeout.
349 */
350 SET_NONBLOCKING(fd);
351
352 /* no need to use NET_Connect as non-blocking */
353 connect_rv = connect(fd, (struct sockaddr *)&him, len);
354
355 /* connection not established immediately */
356 if (connect_rv != 0) {
357 socklen_t optlen;
358 jlong prevTime = JVM_CurrentTimeMillis(env, 0);
359
360 if (errno != EINPROGRESS) {
361 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
362 "connect failed");
363 SET_BLOCKING(fd);
364 return;
365 }
366
367 /*
368 * Wait for the connection to be established or a
369 * timeout occurs. poll needs to handle EINTR in
370 * case lwp sig handler redirects any process signals to
371 * this thread.
372 */
373 while (1) {
374 jlong newTime;
375 struct pollfd pfd;
376 pfd.fd = fd;
377 pfd.events = POLLOUT;
378
379 errno = 0;
380 connect_rv = NET_Poll(&pfd, 1, timeout);
381
382 if (connect_rv >= 0) {
383 break;
384 }
385 if (errno != EINTR) {
386 break;
387 }
388
389 /*
390 * The poll was interrupted so adjust timeout and
391 * restart
392 */
393 newTime = JVM_CurrentTimeMillis(env, 0);
394 timeout -= (newTime - prevTime);
395 if (timeout <= 0) {
396 connect_rv = 0;
397 break;
398 }
399 prevTime = newTime;
400
401 } /* while */
402
403 if (connect_rv == 0) {
404 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
405 "connect timed out");
406
407 /*
408 * Timeout out but connection may still be established.
409 * At the high level it should be closed immediately but
410 * just in case we make the socket blocking again and
411 * shutdown input & output.
412 */
413 SET_BLOCKING(fd);
414 shutdown(fd, 2);
415 return;
416 }
417
418 /* has connection been established */
419 optlen = sizeof(connect_rv);
420 if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&connect_rv,
421 &optlen) <0) {
422 connect_rv = errno;
423 }
424 }
425
426 /* make socket blocking again */
427 SET_BLOCKING(fd);
428
429 /* restore errno */
430 if (connect_rv != 0) {
431 errno = connect_rv;
432 connect_rv = -1;
433 }
434 }
435
436 /* report the appropriate exception */
437 if (connect_rv < 0) {
438
439 #ifdef __linux__
440 /*
441 * Linux/GNU distribution setup /etc/hosts so that
442 * InetAddress.getLocalHost gets back the loopback address
443 * rather than the host address. Thus a socket can be
444 * bound to the loopback address and the connect will
445 * fail with EADDRNOTAVAIL. In addition the Linux kernel
446 * returns the wrong error in this case - it returns EINVAL
447 * instead of EADDRNOTAVAIL. We handle this here so that
448 * a more descriptive exception text is used.
449 */
450 if (connect_rv == -1 && errno == EINVAL) {
451 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
452 "Invalid argument or cannot assign requested address");
453 return;
454 }
455 #endif
456 #if defined(EPROTO)
457 if (errno == EPROTO) {
458 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ProtocolException",
459 "Protocol error");
460 return;
461 }
462 #endif
463 if (errno == ECONNREFUSED) {
464 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
465 "Connection refused");
466 } else if (errno == ETIMEDOUT) {
467 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
468 "Connection timed out");
469 } else if (errno == EHOSTUNREACH) {
470 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "NoRouteToHostException",
471 "Host unreachable");
472 } else if (errno == EADDRNOTAVAIL) {
473 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "NoRouteToHostException",
474 "Address not available");
475 } else if ((errno == EISCONN) || (errno == EBADF)) {
476 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
477 "Socket closed");
478 } else {
479 JNU_ThrowByNameWithMessageAndLastError
480 (env, JNU_JAVANETPKG "SocketException", "connect failed");
481 }
482 return;
483 }
484
485 (*env)->SetIntField(env, fdObj, IO_fd_fdID, fd);
486
487 /* set the remote peer address and port */
488 (*env)->SetObjectField(env, this, psi_addressID, iaObj);
489 (*env)->SetIntField(env, this, psi_portID, port);
490
491 /*
492 * we need to initialize the local port field if bind was called
493 * previously to the connect (by the client) then localport field
494 * will already be initialized
495 */
496 if (localport == 0) {
497 /* Now that we're a connected socket, let's extract the port number
498 * that the system chose for us and store it in the Socket object.
499 */
500 socklen_t slen = SOCKADDR_LEN;
501 if (getsockname(fd, (struct sockaddr *)&him, &slen) == -1) {
502 JNU_ThrowByNameWithMessageAndLastError
503 (env, JNU_JAVANETPKG "SocketException", "Error getting socket name");
504 } else {
505 localport = NET_GetPortFromSockaddr((struct sockaddr *)&him);
506 (*env)->SetIntField(env, this, psi_localportID, localport);
507 }
508 }
509 }
510
511 /*
512 * Class: java_net_PlainSocketImpl
513 * Method: socketBind
514 * Signature: (Ljava/net/InetAddress;I)V
515 */
516 JNIEXPORT void JNICALL
517 Java_java_net_PlainSocketImpl_socketBind(JNIEnv *env, jobject this,
518 jobject iaObj, jint localport) {
519
520 /* fdObj is the FileDescriptor field on this */
521 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
522 /* fd is an int field on fdObj */
523 int fd;
524 int len;
525 SOCKADDR him;
526
527 if (IS_NULL(fdObj)) {
528 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
529 "Socket closed");
530 return;
531 } else {
532 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
533 }
534 if (IS_NULL(iaObj)) {
535 JNU_ThrowNullPointerException(env, "iaObj is null.");
536 return;
537 }
538
539 /* bind */
540 if (NET_InetAddressToSockaddr(env, iaObj, localport, (struct sockaddr *)&him,
541 &len, JNI_TRUE) != 0) {
542 return;
543 }
544 setDefaultScopeID(env, (struct sockaddr *)&him);
545
546 if (NET_Bind(fd, (struct sockaddr *)&him, len) < 0) {
547 if (errno == EADDRINUSE || errno == EADDRNOTAVAIL ||
548 errno == EPERM || errno == EACCES) {
549 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "BindException",
550 "Bind failed");
551 } else {
552 JNU_ThrowByNameWithMessageAndLastError
553 (env, JNU_JAVANETPKG "SocketException", "Bind failed");
554 }
555 return;
556 }
557
558 /* set the address */
559 (*env)->SetObjectField(env, this, psi_addressID, iaObj);
560
561 /* initialize the local port */
562 if (localport == 0) {
563 socklen_t slen = sizeof(him);
564 /* Now that we're a connected socket, let's extract the port number
565 * that the system chose for us and store it in the Socket object.
566 */
567 if (getsockname(fd, (struct sockaddr *)&him, &slen) == -1) {
568 JNU_ThrowByNameWithMessageAndLastError
569 (env, JNU_JAVANETPKG "SocketException", "Error getting socket name");
570 return;
571 }
572 localport = NET_GetPortFromSockaddr((struct sockaddr *)&him);
573 (*env)->SetIntField(env, this, psi_localportID, localport);
574 } else {
575 (*env)->SetIntField(env, this, psi_localportID, localport);
576 }
577 }
578
579 /*
580 * Class: java_net_PlainSocketImpl
581 * Method: socketListen
582 * Signature: (I)V
583 */
584 JNIEXPORT void JNICALL
585 Java_java_net_PlainSocketImpl_socketListen(JNIEnv *env, jobject this,
586 jint count)
587 {
588 /* this FileDescriptor fd field */
589 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
590 /* fdObj's int fd field */
591 int fd;
592
593 if (IS_NULL(fdObj)) {
594 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
595 "Socket closed");
596 return;
597 } else {
598 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
599 }
600
601 /*
602 * Workaround for bugid 4101691 in Solaris 2.6. See 4106600.
603 * If listen backlog is Integer.MAX_VALUE then subtract 1.
604 */
605 if (count == 0x7fffffff)
606 count -= 1;
607
608 if (listen(fd, count) == -1) {
609 JNU_ThrowByNameWithMessageAndLastError
610 (env, JNU_JAVANETPKG "SocketException", "Listen failed");
611 }
612 }
613
614 /*
615 * Class: java_net_PlainSocketImpl
616 * Method: socketAccept
617 * Signature: (Ljava/net/SocketImpl;)V
618 */
619 JNIEXPORT void JNICALL
620 Java_java_net_PlainSocketImpl_socketAccept(JNIEnv *env, jobject this,
621 jobject socket)
622 {
623 /* fields on this */
624 int port;
625 jint timeout = (*env)->GetIntField(env, this, psi_timeoutID);
626 jlong prevTime = 0;
627 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
628
629 /* the FileDescriptor field on socket */
630 jobject socketFdObj;
631 /* the InetAddress field on socket */
632 jobject socketAddressObj;
633
634 /* the ServerSocket fd int field on fdObj */
635 jint fd;
636
637 /* accepted fd */
638 jint newfd;
639
640 SOCKADDR him;
641 socklen_t slen = SOCKADDR_LEN;
642
643 if (IS_NULL(fdObj)) {
644 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
645 "Socket closed");
646 return;
647 } else {
648 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
649 }
650 if (IS_NULL(socket)) {
651 JNU_ThrowNullPointerException(env, "socket is null");
652 return;
653 }
654
655 /*
656 * accept connection but ignore ECONNABORTED indicating that
657 * connection was eagerly accepted by the OS but was reset
658 * before accept() was called.
659 *
660 * If accept timeout in place and timeout is adjusted with
661 * each ECONNABORTED or EWOULDBLOCK to ensure that semantics
662 * of timeout are preserved.
663 */
664 for (;;) {
665 int ret;
666
667 /* first usage pick up current time */
668 if (prevTime == 0 && timeout > 0) {
669 prevTime = JVM_CurrentTimeMillis(env, 0);
670 }
671
672 /* passing a timeout of 0 to poll will return immediately,
673 but in the case of ServerSocket 0 means infinite. */
674 if (timeout <= 0) {
675 ret = NET_Timeout(fd, -1);
676 } else {
677 ret = NET_Timeout(fd, timeout);
678 }
679 if (ret == 0) {
680 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
681 "Accept timed out");
682 return;
683 } else if (ret == -1) {
684 if (errno == EBADF) {
685 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
686 } else if (errno == ENOMEM) {
687 JNU_ThrowOutOfMemoryError(env, "NET_Timeout native heap allocation failed");
688 } else {
689 JNU_ThrowByNameWithMessageAndLastError
690 (env, JNU_JAVANETPKG "SocketException", "Accept failed");
691 }
692 return;
693 }
694
695 newfd = NET_Accept(fd, (struct sockaddr *)&him, &slen);
696
697 /* connection accepted */
698 if (newfd >= 0) {
699 SET_BLOCKING(newfd);
700 break;
701 }
702
703 /* non (ECONNABORTED or EWOULDBLOCK) error */
704 if (!(errno == ECONNABORTED || errno == EWOULDBLOCK)) {
705 break;
706 }
707
708 /* ECONNABORTED or EWOULDBLOCK error so adjust timeout if there is one. */
709 if (timeout) {
710 jlong currTime = JVM_CurrentTimeMillis(env, 0);
711 timeout -= (currTime - prevTime);
712
713 if (timeout <= 0) {
714 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
715 "Accept timed out");
716 return;
717 }
718 prevTime = currTime;
719 }
720 }
721
722 if (newfd < 0) {
723 if (newfd == -2) {
724 JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException",
725 "operation interrupted");
726 } else {
727 if (errno == EINVAL) {
728 errno = EBADF;
729 }
730 if (errno == EBADF) {
731 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
732 } else {
733 JNU_ThrowByNameWithMessageAndLastError
734 (env, JNU_JAVANETPKG "SocketException", "Accept failed");
735 }
736 }
737 return;
738 }
739
740 /*
741 * fill up the remote peer port and address in the new socket structure.
742 */
743 socketAddressObj = NET_SockaddrToInetAddress(env, (struct sockaddr *)&him, &port);
744 if (socketAddressObj == NULL) {
745 /* should be pending exception */
746 close(newfd);
747 return;
748 }
749
750 /*
751 * Populate SocketImpl.fd.fd
752 */
753 socketFdObj = (*env)->GetObjectField(env, socket, psi_fdID);
754 (*env)->SetIntField(env, socketFdObj, IO_fd_fdID, newfd);
755
756 (*env)->SetObjectField(env, socket, psi_addressID, socketAddressObj);
757 (*env)->SetIntField(env, socket, psi_portID, port);
758 /* also fill up the local port information */
759 port = (*env)->GetIntField(env, this, psi_localportID);
760 (*env)->SetIntField(env, socket, psi_localportID, port);
761 }
762
763
764 /*
765 * Class: java_net_PlainSocketImpl
766 * Method: socketAvailable
767 * Signature: ()I
768 */
769 JNIEXPORT jint JNICALL
770 Java_java_net_PlainSocketImpl_socketAvailable(JNIEnv *env, jobject this) {
771
772 jint ret = -1;
773 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
774 jint fd;
775
776 if (IS_NULL(fdObj)) {
777 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
778 "Socket closed");
779 return -1;
780 } else {
781 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
782 }
783 /* NET_SocketAvailable returns 0 for failure, 1 for success */
784 if (NET_SocketAvailable(fd, &ret) == 0){
785 if (errno == ECONNRESET) {
786 JNU_ThrowByName(env, "sun/net/ConnectionResetException", "");
787 } else {
788 JNU_ThrowByNameWithMessageAndLastError
789 (env, JNU_JAVANETPKG "SocketException", "ioctl FIONREAD failed");
790 }
791 }
792 return ret;
793 }
794
795 /*
796 * Class: java_net_PlainSocketImpl
797 * Method: socketClose0
798 * Signature: (Z)V
799 */
800 JNIEXPORT void JNICALL
801 Java_java_net_PlainSocketImpl_socketClose0(JNIEnv *env, jobject this,
802 jboolean useDeferredClose) {
803
804 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
805 jint fd;
806
807 if (IS_NULL(fdObj)) {
808 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
809 "socket already closed");
810 return;
811 } else {
812 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
813 }
814 if (fd != -1) {
815 if (useDeferredClose && marker_fd >= 0) {
816 NET_Dup2(marker_fd, fd);
817 } else {
818 (*env)->SetIntField(env, fdObj, IO_fd_fdID, -1);
819 NET_SocketClose(fd);
820 }
821 }
822 }
823
824 /*
825 * Class: java_net_PlainSocketImpl
826 * Method: socketShutdown
827 * Signature: (I)V
828 */
829 JNIEXPORT void JNICALL
830 Java_java_net_PlainSocketImpl_socketShutdown(JNIEnv *env, jobject this,
831 jint howto)
832 {
833
834 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
835 jint fd;
836
837 /*
838 * WARNING: THIS NEEDS LOCKING. ALSO: SHOULD WE CHECK for fd being
839 * -1 already?
840 */
841 if (IS_NULL(fdObj)) {
842 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
843 "socket already closed");
844 return;
845 } else {
846 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
847 }
848 shutdown(fd, howto);
849 }
850
851
852 /*
853 * Class: java_net_PlainSocketImpl
854 * Method: socketSetOption0
855 * Signature: (IZLjava/lang/Object;)V
856 */
857 JNIEXPORT void JNICALL
858 Java_java_net_PlainSocketImpl_socketSetOption0(JNIEnv *env, jobject this,
859 jint cmd, jboolean on,
860 jobject value) {
861 int fd;
862 int level, optname, optlen;
863 union {
864 int i;
865 struct linger ling;
866 } optval;
867
868 /*
869 * Check that socket hasn't been closed
870 */
871 fd = getFD(env, this);
872 if (fd < 0) {
873 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
874 "Socket closed");
875 return;
876 }
877
878 /*
879 * SO_TIMEOUT is a NOOP on Solaris/Linux
880 */
881 if (cmd == java_net_SocketOptions_SO_TIMEOUT) {
882 return;
883 }
884
885 /*
886 * Map the Java level socket option to the platform specific
887 * level and option name.
888 */
889 if (NET_MapSocketOption(cmd, &level, &optname)) {
890 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Invalid option");
891 return;
892 }
893
894 switch (cmd) {
895 case java_net_SocketOptions_SO_SNDBUF :
896 case java_net_SocketOptions_SO_RCVBUF :
897 case java_net_SocketOptions_SO_LINGER :
898 case java_net_SocketOptions_IP_TOS :
899 {
900 jclass cls;
901 jfieldID fid;
902
903 cls = (*env)->FindClass(env, "java/lang/Integer");
904 CHECK_NULL(cls);
905 fid = (*env)->GetFieldID(env, cls, "value", "I");
906 CHECK_NULL(fid);
907
908 if (cmd == java_net_SocketOptions_SO_LINGER) {
909 if (on) {
910 optval.ling.l_onoff = 1;
911 optval.ling.l_linger = (*env)->GetIntField(env, value, fid);
912 } else {
913 optval.ling.l_onoff = 0;
914 optval.ling.l_linger = 0;
915 }
916 optlen = sizeof(optval.ling);
917 } else {
918 optval.i = (*env)->GetIntField(env, value, fid);
919 optlen = sizeof(optval.i);
920 }
921
922 break;
923 }
924
925 /* Boolean -> int */
926 default :
927 optval.i = (on ? 1 : 0);
928 optlen = sizeof(optval.i);
929
930 }
931
932 if (NET_SetSockOpt(fd, level, optname, (const void *)&optval, optlen) < 0) {
933 #if defined(__solaris__) || defined(_AIX)
934 if (errno == EINVAL) {
935 // On Solaris setsockopt will set errno to EINVAL if the socket
936 // is closed. The default error message is then confusing
937 char fullMsg[128];
938 jio_snprintf(fullMsg, sizeof(fullMsg), "Invalid option or socket reset by remote peer");
939 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", fullMsg);
940 return;
941 }
942 #endif /* __solaris__ */
943 JNU_ThrowByNameWithMessageAndLastError
944 (env, JNU_JAVANETPKG "SocketException", "Error setting socket option");
945 }
946 }
947
948 /*
949 * Class: java_net_PlainSocketImpl
950 * Method: socketGetOption
951 * Signature: (I)I
952 */
953 JNIEXPORT jint JNICALL
954 Java_java_net_PlainSocketImpl_socketGetOption(JNIEnv *env, jobject this,
955 jint cmd, jobject iaContainerObj) {
956
957 int fd;
958 int level, optname, optlen;
959 union {
960 int i;
961 struct linger ling;
962 } optval;
963
964 /*
965 * Check that socket hasn't been closed
966 */
967 fd = getFD(env, this);
968 if (fd < 0) {
969 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
970 "Socket closed");
971 return -1;
972 }
973
974 /*
975 * SO_BINDADDR isn't a socket option
976 */
977 if (cmd == java_net_SocketOptions_SO_BINDADDR) {
978 SOCKADDR him;
979 socklen_t len = 0;
980 int port;
981 jobject iaObj;
982 jclass iaCntrClass;
983 jfieldID iaFieldID;
984
985 len = SOCKADDR_LEN;
986
987 if (getsockname(fd, (struct sockaddr *)&him, &len) < 0) {
988 JNU_ThrowByNameWithMessageAndLastError
989 (env, JNU_JAVANETPKG "SocketException", "Error getting socket name");
990 return -1;
991 }
992 iaObj = NET_SockaddrToInetAddress(env, (struct sockaddr *)&him, &port);
993 CHECK_NULL_RETURN(iaObj, -1);
994
995 iaCntrClass = (*env)->GetObjectClass(env, iaContainerObj);
996 iaFieldID = (*env)->GetFieldID(env, iaCntrClass, "addr", "Ljava/net/InetAddress;");
997 CHECK_NULL_RETURN(iaFieldID, -1);
998 (*env)->SetObjectField(env, iaContainerObj, iaFieldID, iaObj);
999 return 0; /* notice change from before */
1000 }
1001
1002 /*
1003 * Map the Java level socket option to the platform specific
1004 * level and option name.
1005 */
1006 if (NET_MapSocketOption(cmd, &level, &optname)) {
1007 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Invalid option");
1008 return -1;
1009 }
1010
1011 /*
1012 * Args are int except for SO_LINGER
1013 */
1014 if (cmd == java_net_SocketOptions_SO_LINGER) {
1015 optlen = sizeof(optval.ling);
1016 } else {
1017 optlen = sizeof(optval.i);
1018 }
1019
1020 if (NET_GetSockOpt(fd, level, optname, (void *)&optval, &optlen) < 0) {
1021 JNU_ThrowByNameWithMessageAndLastError
1022 (env, JNU_JAVANETPKG "SocketException", "Error getting socket option");
1023 return -1;
1024 }
1025
1026 switch (cmd) {
1027 case java_net_SocketOptions_SO_LINGER:
1028 return (optval.ling.l_onoff ? optval.ling.l_linger: -1);
1029
1030 case java_net_SocketOptions_SO_SNDBUF:
1031 case java_net_SocketOptions_SO_RCVBUF:
1032 case java_net_SocketOptions_IP_TOS:
1033 return optval.i;
1034
1035 default :
1036 return (optval.i == 0) ? -1 : 1;
1037 }
1038 }
1039
1040
1041 /*
1042 * Class: java_net_PlainSocketImpl
1043 * Method: socketSendUrgentData
1044 * Signature: (B)V
1045 */
1046 JNIEXPORT void JNICALL
1047 Java_java_net_PlainSocketImpl_socketSendUrgentData(JNIEnv *env, jobject this,
1048 jint data) {
1049 /* The fd field */
1050 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
1051 int n, fd;
1052 unsigned char d = data & 0xFF;
1053
1054 if (IS_NULL(fdObj)) {
1055 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
1056 return;
1057 } else {
1058 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
1059 /* Bug 4086704 - If the Socket associated with this file descriptor
1060 * was closed (sysCloseFD), the file descriptor is set to -1.
1061 */
1062 if (fd == -1) {
1063 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
1064 return;
1065 }
1066
1067 }
1068 n = NET_Send(fd, (char *)&d, 1, MSG_OOB);
1069 if (n == -1) {
1070 JNU_ThrowIOExceptionWithLastError(env, "Write failed");
1071 }
1072 }